An electroactive co-polymer as corrosion inhibitor for steel in sulphuric acid medium

被引：56
|
作者：
Achary, Ganesha [1 ]
Naik, Y. Arthoba [1 ]
Kumar, S. Vijay [2 ]
Venkatesha, T. V. [1 ]
Sherigara, B. S. [2 ]
机构：
[1] Kuvempu Univ, Sch Chem Sci, Dept PG Studies & Res Chem, Jnana Sahyadri 577451, Shankaraghatta, India
[2] Kuvempu Univ, Sch Chem Sci, Dept PG Studies & Res Ind Chem, Jnana Sahyadri 577451, Shankaraghatta, India
来源：
APPLIED SURFACE SCIENCE | 2008年 / 254卷 / 17期
关键词：
adsorption; corrosion inhibition; co-polymer and electroactive;
D O I：
10.1016/j.apsusc.2008.02.103
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The corrosion behavior of mild steel in sulphuric acid solution containing various concentrations of a copolymer formed between maleic anhydride and N-vinyl-2-pyrrolidone (VPMA) was investigated using weight-loss, polarization and electrochemical impedance techniques. The polymer acts as an effective corrosion inhibitor for steel in sulphuric acid medium. The inhibition process is attributed to the formation of an adsorbed film of co-polymer on the metal surface which protects the metal against corrosion. Scanning electron microscopy (SEM) studies of the metal surfaces confirmed the existence of an adsorbed film. The adsorption followed the Langmuir isotherm. The protection efficiency increased with increase in inhibitor concentration and decreased with increase in temperature and acid concentration. The thermodynamic functions of the adsorption and dissolution processes were evaluated. (C) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码：5569 / 5573
页数：5
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